code: def test_two_experiments_datacenter(self):
      oldcred = os.environ.get("GOOGLE_APPLICATION_CREDENTIALS")
      os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = os.environ[
          "GOOGLE_APPLICATION_CREDENTIALS_DC"
      ]
  
      queue_name = "test_queue_" + str(uuid.uuid4())
  
      self._run_test_myfiles(
          config=self.get_config_path("test_config_datacenter.yaml"),
          queue=queue_name,
          shutdown_del_queue=True,
      )
      if oldcred:
          os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = oldcred
  
imports: import uuid
  import random
  import unittest
  import os
  import hashlib
  import six
  import tempfile
  from timeout_decorator import timeout
  from .completion_service import CompletionService
  from studio.extra_util import has_aws_credentials
  from studio.util.util import rand_string, filehash
  from studio.storage.storage_util import download_file
label_desc: Use image node_id 10 for calling the CompletionServiceTest obj's underlying member method code with example usage: obj.test_two_experiments_datacenter() without return types